The Nostalrius server was/is a private world of Warcraft running the core game, with no expansions or custom content added. No cash shop or any of that cancer, a pure game experience bringing people back to early/mid 2000's.
The server had 800.000 registered accounts and 150.000 active accounts , which is a lot for a private server of any kind. The server was shut down on April 10 2016 after receiving a cease and desist letter from Blizzard. After that the team behind Nostalrius had a sit down with blizzard discussing the possibility to bring back the core game on separate servers. Nothing have happened since then and the databases are now given to new owners, some of the core developer team has also gone over to this new project.
I'm going to start fresh on their new pvp server and i hope to see other steemians in there, maybe we could make a steem guild?